feat: add project-review workflow (whole-project / single-feature review)

Adds the project-review workflow for code review independent of the git
diff. The scope is parsed from the user instruction: 全面/整个项目 ->
whole-project (score every source file), otherwise feature + target
keyword (locate the code with semantic search + graph queries).

- scoring_tools.py: score_review_func gains all_files=True to score every
  source file in the graph via store.get_all_files()
- main.py: score_review_tool gains all_files param; registers the
  project_review MCP prompt (prompts 6->7)
- prompts.py: project_review_prompt(scope, target) with whole-project and
  feature branches (fixed a precedence bug that truncated the feature text)
- skills.py + skills/project-review/: new read-only project-review skill
  with shared checklists
- .opencode/command/code-review-graph-project-review.md: slash command
- tests: test_project_review.py (prompt rendering), TestProjectReviewPrompt,
  skill count assertions 5->6, all_files wiring checks
- docs: prompts (6->7) + project-review entries across COMMANDS, CLAUDE,
  README (+localized), INDEX, architecture, LLM-OPTIMIZED-REFERENCE,
  CHANGELOG

tests/test_project_review.py

@@ -0,0 +1,60 @@
+"""Tests for the project-review workflow (whole-project / feature scope)."""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from fastmcp.prompts.prompt import Message  # noqa: E402
+
+from code_review_graph.prompts import project_review_prompt  # noqa: E402
+
+
+def _text(msg: Message) -> str:
+    return msg.content.text
+
+
+class TestProjectReviewPromptRendering:
+    def test_whole_project_renders_full_workflow(self):
+        text = _text(project_review_prompt()[0])
+        # Header + shared steps 1-4 must all be present.
+        assert "## Project Review Workflow" in text
+        assert "scope=whole-project" in text
+        assert "1. Call" in text
+        assert "4. Locate high-risk" in text
+        # whole-project branch uses all_files=True.
+        assert "all_files=True" in text
+        assert "get_knowledge_gaps" in text
+
+    def test_feature_renders_feature_branch(self):
+        text = _text(project_review_prompt(scope="feature", target="checkout")[0])
+        assert "scope=feature" in text
+        assert "target=checkout" in text
+        # Shared steps 1-4 must still be present (no truncation).
+        assert "4. Locate high-risk" in text
+        # Feature branch: semantic search + impact radius, not all_files.
+        assert "semantic_search_nodes" in text
+        assert "get_impact_radius" in text
+        assert "all_files=True" not in text
+
+    def test_default_scope_is_whole_project(self):
+        text = _text(project_review_prompt()[0])
+        assert "scope=whole-project" in text
+
+    def test_read_only_present(self):
+        text = _text(project_review_prompt()[0])
+        assert "READ-ONLY" in text
+
+    def test_both_branches_have_preamble(self):
+        assert "get_minimal_context" in _text(project_review_prompt()[0])
+        assert "get_minimal_context" in _text(
+            project_review_prompt(scope="feature", target="auth")[0]
+        )
+
+    def test_both_branches_end_with_report_step(self):
+        whole = _text(project_review_prompt()[0])
+        feat = _text(project_review_prompt(scope="feature", target="x")[0])
+        assert "generate_report" in whole
+        assert "generate_report" in feat